My sister just bought a house with a 14,000gal agp that was clearly not closed or covered properly last yr. And since I use tfp method and mine looks so good they recruited me for help, tho mine has never been that bad so I'm not 100% where to go now. It's dark green tho has gotten lighter. Got most of the debris off the floor and been vacuuming sweeping and back washing all day. We added 5gal 10% chlorinator and 4lbs of shock. And I added stabilizer before I left. Fc-1.0, cc-13.5, cya-we'll below 30. I use the k-2006 test kit. Should I just have them continue what we've been doing and give it time? Thanks for any suggestions